| 摘要 |
PROBLEM TO BE SOLVED: To provide a high order treatment purifying vessel having the capability of reducing the BOD value of sewage treated water, as well as neutralizing the treated water, ensuring the decolorization and deodorization thereof for use as a treated water supply and the reduction of running cost, allowing a quick operation after installation, and further having the capability of setting a normal operation state in a short period. SOLUTION: This purifying vessel is made of the first aeration chamber 2 for aerating sewage water via oyster shells as contact materials 2a after the inflow thereof, an anaerobic filter bed chamber 3 for keeping a sewage overflowing from the first aeration chamber 2 in contact with porous artificial filter materials 3a for anaerobic treatment, the second aeration chamber 4 for flowing sewage water purified in the anaerobic filter bed chamber 3 and performing aeration treatment, using the oyster shells as contact materials 4a, and a finishing treatment chamber 5 for introducing water purified from the second aeration chamber 4 and keeping the water in contact with activated carbon 5c to perform a high level of purifying treatment for decolorization and deodorization. |
